3.0.3 Firmware for MMU3

Summary

• Information for the MK4 and MK3.9 owners
• Information for the MK3S+ and MK3.5 owners
• List of pull requests

This is the stable release of firmware version 3.0.3 for the MMU3 unit, primarily intended for the upcoming Original Prusa MK4 and MK3.9. Further details are provided below.

Information for the MK4 and MK3.9 owners

This is an initial release containing updates to the firmware, enabling compatibility with the MMU3 unit and the Original Prusa MK4 and MK3.9.

Please note, that this 3.0.3 release must be paired with a specific firmware version for the printer:
Original Prusa MK4/MK3.9 - Firmware 6.0.0-RC1

Information for the MK3S+ and MK3.5 owners

This firmware release 3.0.3 is not compatible with the MK3S+ or MK3.5 MMU3 setup.

List of pull requests

• CI: Call sudo apt-get update and update cache, checkout actions by @gudnimg in #316
• Add automatic release publishing to GitHub Actions by @vintagepc in #317
• Update stale action to v9 as Node.js 16 are deprecated. by @3d-gussner in #318
• Update build.yml by @vintagepc in #320
• Autorelease workflow... take 3 by @vintagepc in #321
• Add version information at fixed address in flash by @leptun in #319

Full Changelog: v3.0.2...v3.0.3